IF the whole world ban BTC at first BTC will Crash very hard but only for a few month, Demand will be increased while there will be no Legal Seller, All trade will go to undergrand and Black market and illegal traffic, sellers will start to selling BTC 50 X more than current price. BTC will be more expensive, As simple as that,
That was an answer for these who said BTC will die if whole world Ban it, So no BTC never Die.
If all countries decide to ban Bitcoin, things may not go that easy for the price. In a situation like that, there would be noone to be able to use Bitcoin for anything and it would create a chaos for the market.
This is factually incorrect. Banning something does not stop it, it merely forces it underground, and probably increases its price in the market because its harder to buy or sale.
Of course it would harm exchanging, but then again people could start using it for what it was intended for, and stop exchanging it so much. Yes it was intended to pay and be paid with...
It would probably backfire the politicians. You can already see countries that "ban" bitcoin are simply telling wealth to go away, and indeed they: A) Couldn't actually completely stop their people from using it, and B) worsened their economy, in short having the worst of both world. Well that is a typical result of a politician decision maker.
Out of 200ish countries only about 15 have openly legislated against Bitcoin, the vast majority have not taken position and many have regulated it, but even in those not everyone will follow the rules, simply because its possible to find "ways" around them. (Ie. buy used asic equipment and mine bitcoin to obtain some without KYC).